Shade-roller lock.



A. HUSSON.

SHADE ROLLER LOCK.

APELIGATION FILED JUNE 9, 1911.

1,034,457. Patented Aug. 6, 1912.

l AuGUs'r Husson, or osHxosH, wisconsin.`

A t enana-nonnen tecn.

, specificaties of maen- Patent.

Patented' Aug. 6, 1912.

application mea :rane 9, 1911. serial no.l 532,111.

Toall- 'wmm ift may concern: i

Be it known that I, AUGUST HUSSON, a

citizen -of the Unitedl States, residing in' Oshkosh', in the county of Vinnebago and State of Wisconsin, have inventedl new and useful Improvements' in Shade-Roller Locks, of which the following is adescription, reference being had to the accompanying drawings, ywhich are a part of` this specification.k

This invention hasy for its object to pro-' vide means which will prevent the strip'- ping of a window shade from its roll.

It isthe common practice toattach a'window shade toitsv roll by means of tacks or othersecuring devices and when the shade is drawn down too far, it is liable to-be torn from thel tacks or attaching devices and is thus detached from the roll'.

The present invention is designed to afford'a means for limiting the extent of the unwinding of the shade from 'the roll and thus prevent its being' torn from its attaching means. y

Another object of the invention is to limit the eirtentv to which the shade may be wound upon its roll and thus determine the position to which it may be raised when it is desired to prevent the shade being raised to the height of the shade roll.

With the above and other objects in view the invention consists in the window shade -stop as hereinclainied and all equivalents.

Referring to the accompanying drawings in which like characters of reference indicate the same arts in the different viewsv Figure 1 is a nt elevationof a window shade provided with a stop constructedv in accordance with this invention; Fig. 2 is an end view thereof; Fig. 3 is a sectional detail View of the stop'mechanism showing the position of the parts when the shade is raised; .F.i 4 is an end view showing the position o the locking dogs at such time; Fig. 5 is a transversesectionall view through thestop mechanism showing the position of the stop pins' at such time; Fig. 6 is a' sec tional plan view similar te Fig. 3 showing the parts ,in the position for stopping the downward movement of the shade; Eig. 7 is'a corresponding 'View of" the locking deg mechanism thereof at such time; and, Fig. 8 is an end elevation of the shade roll' with the screw stem sectioned.

In these drawings 10 indicates a window shade attached to and wound upon a shade roll 11 in the usual manner and said rolll slot 21 and yon the .propelled by containing the ordinary winding spring with its flattened stein 12 supported and held against turning by the slotted bracket 13 as usual.' Instead of a plain trunnion lbearingat the right hand end of the shade roll, a stop device -is let into a recess 14V in the end of the rod and which stopl device will now be described in detail. A casing, preferably comprising a strip of sheet metal 15 bent and formed into a substantially cylindrical shape with its ends secured to a disk-shaped end plate 16 by having tongs passing' therethrough and4 bent down thereon`,=. fits within the opening 14 in the end of the shade roll and may be held by tacks 17 driven through the end plate 16 into the end of the'shade' roll. A screw rod 18 has its reduced inner end journaled in an opening throughy the inner end of the casing and' is desirably upset to'prevent its withdrawal therefrom. Said rod is also journaled in a central opening through the end plate 16 and has a flattened portion l9'which lits in a g slotted bracket 20, corresponding to the bracket 13 at the other end of the shade roll. The end of the screw rod 18 extends somewhat beyond the flattened portion 19 to constitute a projecting handle by means of which the rod may be conveniently turned in its bearings when detached from the slotted 'bracketf2().k The edges of the strip of sheet metal forming the casing 15 are spaced apart and form parallel walls ot a guide slot 21. A.

nut 22 is threaded on the screw rod 18 Within the casing and is provided with a pro-' jecting key lug 23 which ridesin the guide prevents `thenut from turning screw rod but permits it to travel from one end of the casing to the other as the thread of the screw rod. Thel nut 22 has a stop pin 244 on one side thereof and a` stop pin 25 on the other side, the former being adapted to come into eng'agement with a stop pin 26 on the inner end ofthe screw rod and thus limit the inward movement of the nut and the stop pin 25bein'g' adapted 'to come into engagement with a' stoppin 27 near the other end of the screw rod to limit the outward movement of thnut. A

In applying a shade equipped with this stop device, the desired tension' is given to the winding sprin Vas usual and then the shade drawn o tent which Anecessary for its use, but which is less than its entire length, and the the roll to the full eX-;'

screw rod 18 is turned by hand in the direction to cause the nut 22 to travel inwardly to engage the stop pins 24 and 26. In this position of engagement of the stop pins 24 and 26 it will be impossible to enter the flat portion 19 of the screw rod in the slot of the bracket 20 because in positioning the casing in the end of the shade roll, care is taken that with the parts in this condition the fiat-tened portion of the screw rod will differ in angular position by a quarter turn from the position of the attened portion of the spring stem 12. This necessitat-es the screw rod 18 being turned back a quarter turn to permit its attened'portion 19 to enter the slot of the bracket 20 for a purpose which will be later mentioned. v

Vith the shade roll mounted in both brackets, the shade may be raised and lowered as usual with this exception, that when ,the shade reaches the predetermined position' to which it was drawn when adjustingv the sto device, it will lbecome automatically loc ed'a ainst further downward movement.

Asthe s ade at such time has not been entirely unwound from the shade roll, the

strain incident to the sudden stopping thereof is not exerted on the attachment of the shade to the roll and there is therefore no danger of such attachment giving way. This action of stopping the shade automatically at the desired position results from the travel of the nut 22 in the casing during the movements of the shade, the upward movement of the shade causing the nut to travel fromV left to right and the downward movement of the shade causing the nut to travel in the opposite direction and being nally limited by the engagement of the stop pins24 and 26.

l'When it is desired to limit the position to which the shade may be raised, the device vis so adjusted that the stop pins 25 and 27 engage at thedesired extreme position of the shade, the screw rod being turned by hand while the shade is in this'position as before.

lThe difference in angular position of the flattened portion of screw rod 18 and the flat-tened portion of the spring stem 12 when the former is locked by the engagement of the stop pins and the latter is locked by the engagement of the dogs, assures a suiicient play for the shade when in the osition in which it is locked to permit o 'the disengagement of the dogs. If the dogs should engage at the same time that the Copies of this patent may be obtained tor nve cents each, by addressing Athe yably mounted' in `iiattened p stop pins engage it is obvious that the shade roll could not be 'turned to disengage the do-gs, but at such time the dogs are' out of engagement as shown in Figs. 6 and 7 so that the release of theshade from its lockino` position is not interfered with.

tirVhile a specific construction has been shown and described in detail for the purpose of exemplifying the invention, I do not wish .to be understood as confining myself thereto, except as such limitations may be contained in the respective claim, for it is obvious that the principles involved are capable of embodiment in various orms.

"Furthermorawhile the invention has been 4explained as applicable to window shades, it is capable of performing the desired functions in various other applications, such as in map holders,.curtain rollers and the like, and consequently the term herein employed for convenience is to be understood as comprehending all of such other devices to which the invention may be applied to serve one or more of the useful purposes mentioned.

What ,I claim as new and desire to secure by Letters Patent is: f

In a shade roll lor the like, a housing comprising a strip of sheet metal bent to a U-shape with its edges turned inwardly to form a cylindrical casing with a guide slot between said int-urned edges, an end plate secured to the ends of the stripsaid casing being adapted to fit within the end of the shade roll and turnl therewith, a nut slidthe casing, a key lug on the nut passing through the` guide slotof the casing to cause the nut to t-urn with the shade roll, a screw rod journaled through the end plate of the casing and having its end reduced and journaled in the innerend of the casing, said screw rod being threaded within the nut and having a iiattened portion outside of the casing, a slottedv bracket engaging the flattened portion of the screw rod, said screw rod continuing beyond the o-rtion to form a handleby means of which 1t may be turned, stop pins on the nut, and sto pins on the screw rod to be engaged by t e stop pins on the nut for 11miting the movements of the shade roll..

In testimony whereof, afix my signature, in presence of two witnesses.

T. J. MAGCUNE, Louise E. MAGCUNE.

l(Ionimissionei of Patents Washington, D. C.

shade roll as l 

